/Engine/Source/Editor/BlueprintGraph/Classes/K2Node_GetArrayItem.h
NOTE: This is not the same as a node identification GUID, two node instances can have the same signature (if both call the same function, etc.).
A signature struct, discerning this node from others.
virtual [FBlueprintNodeSignature](API\Editor\BlueprintGraph\FBlueprintNodeSignature) GetSignature() const